Allow react.js and jsxtransformer.js to be overriden by user
Allow user to override jsxtransformer used for .jsx files
Document manual react and JSXTransformer version changing
Allow for drop-in replacement using recommended files structure
Updated docs with right information on changing react's version
Fixed react.js-replacing paths in comments
Rename test asset files due to collisions
Iron out problems left uncaught during rebase
Bump up version to stop being dependent on react versioning
Updated info about drop-in feature in README
readme: fixed info about restarting to bust transformer context cache
Merge pull request #12 from jakubmal/feature/react-dropin

Allow users to override react.js and transformer.js for assets and engine